With the drawing of national boundaries in Southeast Asia during the colonial era and in the wake of decolonization, many indigenous peoples living in remote highlands and forests were divided. On the Korat plateau of the northeast and especially along the border with Laos and Cambodia live various ethnic groups that bear characteristics common with others that are considered indigenous peoples in Thailand. They consist of several Tai speaking groups (Saek, Phuan, Phuthai and Tai song Dam), the Mon-Khmer speaking Kui (also called Kuoy or Suoi) and the So. Larger populations of these peoples live in the respective countries across the border. In Chaiyaphum province lives a group known as Nyahkur, Niakkuoll, Niakuolor or Chao Bon and are considered to speak the old Mon language.